RoboHelp Online Help - when will ver 2022.3 be available

When Adobe will do good help is one of the great unanswered questions of the universe. What you get when you press F1 is what they consider "latest" as near as I can tell.

The skins got renamed in the initial release of RH2022. They're now called Templates. I don't think the interface changed much, so this page for Frameless skins (which you can now only find via search) should be broadly speaking accurate still: https://helpx.adobe.com/robohelp/using/frameless-skin-editor.html . If you're not using Frameless, we generally suggest looking at switching to it, as the editor provides more comprehensive customisation options and it looks like Adobe is focussing most of their effort there.

You're also much better off going to Peter's site for information. See his Robohelp tour specifically:

https://www.grainge.org/pages/authoring/rh_tour/rh2022/introduction/2022.htm